Sand-blast machine



C. F. MOTZ.

SAND BLAST MACHINE.

APPLICATION FILED NOV.2l. 1919.

Patented Aug. 31, 1920.

2 SHEETSSHEET I.

W lli slljllllll INVENTOR C. F. IVIOTZ.

SAND BLAST MACHINE.

APPLICATION FILED NOV. 21, I919.

Patented Aug. 31, 1920.

2 SHEETSSHEET 2.

FIG. 4

: I I I I I I I I I I I FIG. 5 35 Maw? U UNITED STATES PATENT OFFICE.

SAND-BLAST MACHINE.

Specification of Letters Patent.

Patented Aug. 31, 1920.

Application filed Nov-ember 21, 1919. Serial No. 339,674.

To all whom it may concern:

Be it known that I, CHARLES F. Mo'rz, a citizen of the United States, and resident of Monaca, in the county of Beaver and State of Pennsylvania, have invented a new and useful Improvement in Sand-Blast Machines; and I do hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to sand blasting apparatus.

The object of my invention is to provide an apparatus of this character in which the operation of blasting is done rapidly and efiiciently, the action of the apparatus being entirely automatic, the only manual labor being the placing of the ware in position and withdrawing it after it is finished.

To these ends my invention comprises the novel features hereinafter set forth and claimed.

In the accompanying drawings, Figure 1 is a plan view of a portion of my improved apparatus; Fig. 2 is an enlarged elevational view of one of the blasting compartments showing the parts in position for blasting; Fig. 3 is a section on the line 3--3 of Fig. 2; Fig. 4 is a view similar to Fig. 2 showing the door and pattern carrier elevated; and Fig. 5 is an enlarged detail of the ware-carrier and pattern-carrier in position-thereon.

In the drawings the numeral 2 indicates a rotary frame or table whichis mounted on and driven by the central vertical'shaft 3.

Around the periphery of the frame 2 are the compartments 4 in which the sandblasting operations take place. Each compartment 4 has the opening 5 for the insertion and with.- dr'a'wal of the waretobe sand-blasted, and said opening isprovided with the vertically sliding. doorfiwhich is adapted. to move in the guides 7. Connected to the door 6 isthe cable 8 which passes up over thefpulley. 9 mounted on ther'ocker-shaft 10 j ournaled in the bearings 11.- To the free end of the cable 8. is secured the counterweight 12 which is suspended in the space 13 between. the difi'erf ent compartments. v p I, A vertical spindle -14j ournaled in bearings 15 and 16 extends up withinthecomp'artment 4 and said spindle carries at its upper end the head 17 which supports the rubber or like flexible ware-support 18. I lower end of the spindlev 14 is the pulley 19 At the position on the support 18 the pattern-carrier is provided with the holder 29 which is adapted to engage the opening 30 in'the upper end of the shade 22. A bolt 31 is connected to the holder 29, said bolt passing up through the top-plate 24 of the pattern carrier, and a spring 32 surrounds said bolt and is interposed between the holder 29 and the inner face of the plate 24. The pressure of the spring 32on the holder 29 when engaging the upper end of the shade 22 acts to hold said shade securely in position on the waresupport 18.

A collar 33 is secured to the plate 24 of the pattern-carrier. Screwed into the collar33 is the swivel-block 34 in which the rod 35 is swiveled. This rod 35 passes up through, a guide 36'on top of the compartment. A cable or cord 37 is connected to the upper end of the rod 35 and the said rope passes. up over the pulley 38 onthe standard 39. The rope 37 then passes overthe pulley 40 on the shaft 10 down intothe space 13 where the .welght 41 is connected tothe free end ofsaid rope 37 Atthe outer end ofthe shaft lOissecured thecrank-arm 42., cable43 is connectedto the outer end of, said crank-arm, and a weight44is connectedtothe lowerend of said rope 43. FA stop .pin 4 5 is provided with whichthe cable-43 engages whenthe cranlgarin. 42 is thrown over into posltl on lndrcated in Fig. 2 where the doorflis lowered.

, 1Within the-compartment 4. is a pock t4 forthe, sand; or;otherabrading material, and extendingdown into said pocket 1S11l1ep1pe 4'1. which-is connected up, with theno z zle .48. An air-pipe 49 ,is connected. up -;w1th the nozzle,-saidair-pipe passing outside of the compartment 4 and connected flexible vpipe ,50 with the pipe 51, wh ch s supplied with, airfrom the v main air-l1'ne52, A valve .53, controls the supply of air from :thepipe 52 to pipe 51 and said valve has the bell- 55 in the path of said bell crank to open the valve.

A deflector rod 56 is in the path of the movement of the crank-arm 42 and said defiector'operates said crank-arm to rock the shaft 10 to raise the door and at the'same' time lift the pattern-carrier 23, as more fully hereinafter set forth.

In the operation of my improved apparatus, the frame 2 is rotated and the operator at the point where the door is lifted by the crank-arm 42 engaging the deflector rod 56 inserts a shade or other piece of ware through theopening 5 and places it on the ware-support 18. Immediately thereafter the crank-arm 42 disengages from the de flector bar 56 and the door of its own weight is lowered, and at the same time the patterncarrier 23 is likewise lowered bringing the pattern 28 down around the skirt of the shade to be blasted. At the same time the holder 29 engages the opening at the upper end of the shade so as to support the shade securely in position during the blasting operation. As soon as the door is closed in this manner and the pattern-carrier has been lowered, one arm of the bell-crank 54 engages the projection 55 and the valve 53 is opened permitting air to pass into the pipe 49. This blast of air creates a suction in the pipe 47 and the sand is drawn up from the pocket 46 and driven against the shade. -As the shade is rotating the blasting action takes place uniformly alloverthat part of the shade which is exposed, the patternring 28 protecting certain portions of the skirt of the shade which is not acted on by the sand and leaving the design of the pattern on the shade. The blasting continues during the rotation of the table 2 and until the compartment comes around into positionwhere the crank-arm 42 again engages the deflector bar 56, whereupon the door is raised together with the attern-carrier, as indicated m Fig. 3, which permits the operator to insert a hand to remove the shade which has been sand-blasted and introduce another shade before the crank arm 42 disengages operator is kept bus withdrawing and inserting the shades, a l the other operations, such as the raising and closing of the door, and the raising and lowering of the pattern carrier being automatic, as well as the applying and cutting off of air for ope-rat in the sand blast.

hat'I claim is: 1. Sand blasting apparatus comprising a compartment having an opening for the insertion of the ware to be sand-blasted, a

rotary ware-support in said compartment,

means for rotating said ware support, sandblasting means, a vertically movable pattern-carrier, a door for said opening and means for raisin and lowering said door and simultaneous y therewith raising and lowering said pattern-carrier. 2. Sand blasting apparatus comprising a compartment .having an opening for the insertion of the ware to be sand-blasted, a rotary ware-support in said compartment, means for rotating said ware support, sandblasting means, a vertically movable pattern-carrier, a door for said opening, means for raising and lowering said door, and means operated by said first-named means for raising and lowering said pattern-oarr1er.

3.- Sand blasting apparatus comprising a compartment having an opening for the insertion of the ware to be sandblasted, a

rotary ware-support in said compartment,

means for rotating said ware support, sandblasting means, a v rtically movable pattern-carrier, a holder arried by said pattern carrier, a door for said opening, means forraising and lowering said door and simultaneously raising and lowering said patterncarrier and said holder.

4. Sand blasting apparatus comprising a compartment having an opening for the insertion of the ware to be sand-blasted, a

rotary ware-support in said compartment, means for rotating said ware support, sandblasting means, a verticall movable pattern-carrier, a rope connected to said patterncarrier, a sheave engaged by said rope, a

rock-shaft, sheaves on said*rock-shaft, a

door for said opening, a cable connected to said door passing over one of said sheaves, weights connected to said cables, an. arm on said rock shaft, and a camin the path of said arm. a Y

5. Sand blasting apparatus comprising'a rotary frame having a series of compartmnts arranged thereon, each compartment having an opening, a slidable doorfor said opening, a rotary ware-support in said com-' partment, means for rotating said ware-support, sand blasting means,- and means for automatically raising and lowering said door. j

6. Sand blasting apparatus comprising a rotary frame having a series of compartments' arranged thereon, each compartment having an opening, a slidable door for said opening, a rotary ware-support in said compartment, means for rotating said ware-support, sandblasting means, a vertically movable holder, means for raising and lowering said door, and means for bringing said holder in position to engage the ware when said door is lowered.

7. Sand blasting apparatus comprising a rotary frame having a series of compartments arranged thereon each compartment having an opening, a' slidable door for said opening, a rotary Ware-support in said compartment, means for rotating said Ware-support, sand blasting means, a vertically movable spring-actuated holder, means for raising and lowering said door, and means for bringing said spring-actuated holder in position to engage the ware when said door is lowered.

In testimony whereof I, the said CHARLES F. Mo'rz, have hereunto set m hand.

CHAR-LE F. MOTZ. Witness:

JOHN F. WILL. 

